Deopt on storing undefined into double elements.

test/mjsunit/regress/regress-undefined-store-keyed-fast-element.js

Index: test/mjsunit/regress/regress-undefined-store-keyed-fast-element.js
diff --git a/test/mjsunit/regress/regress-1898.js b/test/mjsunit/regress/regress-undefined-store-keyed-fast-element.js
similarity index 89%
copy from test/mjsunit/regress/regress-1898.js
copy to test/mjsunit/regress/regress-undefined-store-keyed-fast-element.js
index 5440446fbf78ca593e8748cd54ea2aefad047542..9e6ec9db07ec3bb127b4f15a432700e637d5ccbd 100644
--- a/test/mjsunit/regress/regress-1898.js
+++ b/test/mjsunit/regress/regress-undefined-store-keyed-fast-element.js
@@ -27,11 +27,11 @@
 
 // Flags: --allow-natives-syntax
 
-function f(x) {
-  Math.log(Math.min(0.1, Math.abs(x)));
+function f(v) {
+  return [0.0, 0.1, 0.2, v];
 }
 
-f(0.1);
-f(0.1);
+assertEquals([0.0, 0.1, 0.2, NaN], f(NaN));
+assertEquals([0.0, 0.1, 0.2, NaN], f(NaN));
 %OptimizeFunctionOnNextCall(f);
-f(0.1);
+assertEquals([0.0, 0.1, 0.2, undefined], f(undefined));